Billy Goat Restaurant solution.

billy-goat-fast-food.php

#!/usr/bin/php -q
<?php 

/*

Problem Solving and Programming Concepts
 
Adam Merrifield (2697795).
 
Billy Goat Fast Food

PSEUDO CODE

start
	Declarations
		string msgQty = "Enter quantity for next item (q to Quit): "
		string msgSelect = "Enter item: "
		int userQty = prompt("Please enter item quantity (q to Quit): ")
		string userSelect
		string product[3] = 'cheeseburger', 'pepsi', 'chips'
		double price[3] = 2.49, 1.00, 0.59
		int quantity[3] = 0, 0, 0
		int noProduct = 1
		
	if userQty <= 0

		output "Your order was empty."

	else 
		while userQty != 'q' && userQty > 0

			userSelect = prompt(msgSelect)
			
			noProduct = 1;

			for i=0, i < count(product), i++
				if userSelect == product[i]
					quantity[i] += userQty
					output "You ordered userQty userSelect."
				else
					noProduct++
				endif
			endfor
					
			if noProduct > count(product)
				output "We don't have any userSelect.";
			}

			userQty = prompt(msgQty)
		endwhile

		tally(priceTable)

	endif

end

tally(prod, pri, qty)
	int tally = 0
	output "Your total order is"
	for i=0, i < count(prod), i++
		if qty[i] > 0
			output "qty[i] prod[i] at pri[i] = pri[i] * qty[i]"
			tally += pri[i] * qty[i]
		endif
	endfor

	output "Your total cost is tally"
	output "Thank you for visiting the Billy Goat Fast Food Restaurant."
void

prompt(message = null) {
	output message
	input = STDIN
return



*/

/**
 * Actual running program
 */

(string)$msgQty = "Enter quantity for next item (q to Quit): ";
(string)$msgSelect = "Enter item: ";
(int)$userQty = prompt("Please enter item quantity (q to Quit): ");
(string)$userSelect = 0;
(array)$product = array('cheeseburger','pepsi', 'chips');
(array)$price = array(2.49, 1.00, 0.59);
(array)$quantity = array(0, 0, 0);
(int)$noProduct = 1;


if ($userQty <= 0) {

	echo "Your order was empty.\n";

} else {
	while ($userQty != 'q' && $userQty > 0) {

		$userSelect = prompt($msgSelect);
		
		$noProduct = 1;
		
		for ($i=0; $i < count($product); $i++) { 
			if ($userSelect == $product[$i]) {
				$quantity[$i] += $userQty;
				echo "You ordered " . $userQty . " " . $userSelect . ".\n";
			} else {
				$noProduct++;
			}
		}

		if ($noProduct > count($product)) {
			echo "We don't have any " . $userSelect . ".\n";
		}
				
		$userQty = prompt($msgQty);
	}

	tally($product, $price, $quantity);
}

function tally($prod, $pri, $qty)
{
	(int)$tally = 0;
	echo "Your total order is\n";
	for ($i=0; $i < count($prod); $i++) {
		if ($qty[$i] > 0) {
			echo $qty[$i] . " " . $prod[$i] . " at $" . number_format($pri[$i], 2, '.', '') . " = $" . number_format($pri[$i] * $qty[$i], 2, '.', '') . "\n";
			$tally += $pri[$i] * $qty[$i];
		}
	}

	echo "Your total cost is $" . number_format($tally, 2, '.', '') . "\n";
	echo "Thank you for visiting the Billy Goat Fast Food Restaurant.\n";
}

function prompt($message = null)
{
	fwrite(STDOUT, $message);
	$input = trim(fgets(STDIN));
	return $input;
}